Power light is flashing on display, screen doesn't light up w/computer

I have it connected as a plalette monitor on a MacPro G5. Also connected is a 30" and another 23" display. These two are working fine. I have connected a 20" to the plug and it successfully lights the 20" up. Obviously the 23" display is defective. Are there internal parts that I can trouble shoot? I am fairly good at repairing computers - installing memory, HDs, video cards, motherboards, etc. Is this something I can do myself?

No, post the links, just let them know what it is. Most of the time we are not dealing with professionals here. This was meant to be constructive criticism to help make you a better advisor to others, you're doing great and your hard work is appreciated very much. I've negated the downvote with an up,

You put me on the right track. I had a 22 monitor with a flashing light (2 short 1 long) Thought it was the back light. I have 2 monitors a 22 inch and a 20 inch took one home to work on and when it came back to the office wouldn't work. After reading the comment about the power adapter I switched the power adapters and it work straight away Cheers my freind

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